Frank Thomas has admitted that he is getting close to retirement at the age of 41. Thomas is the White Sox's all-time leader in home runs, RBI and runs. "That percent right now [that I'll play again] is probably about five percent, since we're so deep into the season now," Thomas said on ESPN 1000. "But I'm still in shape, ready to go, if anything happens. "But I'm getting close to announcing my retirement because I just turned 41. I just want to make sure that it's the move I really want to make. I don't want to be one of those guys that keeps coming back and keeps saying, 'I'm unretiring, I'm coming back.' I want to make sure it's out of my system."